ISSN:
1573-1561
Keywords:
Induced resistance
;
baculovirus
;
Heliothis virescens
;
Helicoverpa zea
;
peroxidase
;
polyphenol oxidase
;
oxidative enzymes
;
tritrophic interactions
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Chemistry and Pharmacology
Notes:
Abstract Constitutive phenolase activity of plants has a profound ability to modulate disease in insects caused by baculoviruses. We investigated the influence of damage-induced plant phenolic oxidases in cotton and tomato on mortality caused by two different baculoviruses in their respective hosts, Heliothis virescens (L.) and Helicoverpa zea (Boddie). For both plant species, peroxidase (POD) and phenolic levels were predictive of larval mortality caused by baculoviruses. The higher the POD activity, the lower the mortality in both hosts. Different classes of phenolics (e.g., monohydroxyphenolics vs. catecholic phenolics) in combination with POD activity had different effects on the severity of viral disease depending upon mixture, which implies that viral efficacy is predictable only if total chemical content of the plants is specified. Inhibition of baculoviral disease by plant phenolase activity has potential implications for the compatibility of baculoviruses with induced resistance in IPM programs.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1022528324344
